Tessa Quinn
Stroke is a medical emergency, and getting to the ER quickly is crucial for diagnosis and treatment. Tests for stroke usually begin in the ambulance, and continue at the hospital. Doctors will ask about symptoms and medical history, and perform physical and neurological exams, which include checking blood pressure and mental alertness. Imaging tests such as CT scans and MRIs are used to see inside the brain, and determine the type and location of the stroke. Doctors will also perform blood tests to rule out other conditions and determine treatment.
| Characteristics | Values |
|---|---|
| Tests to identify a stroke | F-A-S-T test, neurological exam, physical exam, blood tests, imaging tests |
| Imaging tests | Computed tomography (CT) scan, Magnetic resonance imaging (MRI), CT or MR angiogram, positron emission tomography (PET), digital subtraction angiography (DSA) |
| Blood tests | Complete blood count (CBC), thyroid test, blood glucose test, cholesterol test, C-reactive protein test, blood protein test, red blood cell and platelet count test |
| Treatment | Clot-busting drug called tPA, aspirin, blood-thinning medication, surgery, radiation, medication to lower blood pressure, stent to remove clot, suction tube to remove clot |
| Precautions | Call 911 immediately if a stroke is suspected |
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What You'll Learn
- Doctors ask about symptoms, medical history, and risk factors
- They perform a physical exam, checking blood pressure, alertness, numbness, and speech
- Imaging tests such as CT scans, MRIs, and angiograms are used to visualise the brain and blood vessels
- Blood tests are conducted to check for clotting, infection, and blood sugar levels
- Electrocardiograms (ECGs) can detect heart electrical activity and atrial fibrillation
Doctors ask about symptoms, medical history, and risk factors
Doctors will ask about symptoms, medical history, and risk factors when diagnosing a stroke. This is a crucial step in determining the type of stroke, its cause, and the best course of treatment.
When a patient or their family member calls 911, paramedics begin collecting information about the patient's symptoms, which helps doctors diagnose the type of stroke and start treatment as soon as the patient arrives at the hospital. Doctors will ask about symptoms such as facial sagging, arm weakness, and slurred speech, as well as when these symptoms began. They will also inquire about the patient's medical history, including any personal or family history of stroke, and risk factors such as high blood pressure, atrial fibrillation, or diabetes.
During the physical exam, doctors will check for mental alertness, numbness, weakness, or trouble with speaking, seeing, or walking. They will also listen to the patient's heart and check for signs of carotid artery disease, a common cause of ischemic stroke. The neurological exam assesses the nervous system to determine if the patient has had a stroke and the extent of its impact.
Blood tests are also conducted to rule out other health problems with similar symptoms, such as seizures, migraines, or heart problems. These tests include complete blood counts (CBC), thyroid tests, blood glucose measurements, cholesterol tests, and C-reactive protein tests. Imaging tests, such as CT scans and MRIs, are used to visualize the brain and identify damage or bleeding caused by the stroke.
The information gathered from these assessments helps doctors diagnose the type of stroke, determine its cause, and develop an effective treatment plan to lower the chances of another stroke occurring.
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They perform a physical exam, checking blood pressure, alertness, numbness, and speech
If you or someone you know is experiencing symptoms of a stroke, it is important to call 911 immediately. Stroke is a medical emergency, and the faster treatment begins, the better the chances of recovery. When you call 911, paramedics will start collecting information and communicating it to the hospital, saving valuable time. Once you arrive at the hospital, a doctor will perform a physical exam to check your blood pressure, alertness, numbness, and speech. They will also ask you or your family members about your symptoms, risk factors, and medical history. This information helps them understand the severity of the stroke and plan your treatment.
During the physical exam, the doctor will take your blood pressure and check for mental alertness. They will assess your ability to speak, see, and walk, looking for any signs of weakness or numbness in your body. The exam also helps determine the type of stroke, such as an ischaemic stroke caused by a blood clot blocking blood flow to the brain or a haemorrhagic stroke caused by a burst blood vessel.
The physical exam is often complemented by imaging tests, such as a computed tomography (CT) scan, which uses X-rays to take detailed pictures of your brain, helping to identify bleeding or damage to brain cells. Another imaging test is magnetic resonance imaging (MRI), which uses magnets and radio waves to create images of your brain and can show brain changes caused by a stroke. These tests provide valuable information for diagnosing and treating strokes.
Additionally, blood tests may be conducted to examine factors such as blood sugar levels, cholesterol levels, and thyroid hormone levels, all of which can impact stroke risk and treatment options. It is important to remember that the physical exam is just one aspect of the comprehensive evaluation and treatment process for strokes.
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Imaging tests such as CT scans, MRIs, and angiograms are used to visualise the brain and blood vessels
When a patient is suspected of having a stroke, doctors will often order multiple tests, including imaging tests such as CT scans, MRIs, and angiograms, to visualise the brain and blood vessels. These imaging tests are crucial for identifying the type of stroke and ruling out other potential causes of stroke symptoms.
Computed tomography (CT) scans are often one of the first tests performed in a stroke evaluation. CT scans use X-rays to capture images of the brain, which are then used by computers to create cross-sectional views. These images can reveal areas of abnormality caused by blood clots, tumours, or blood vessel defects. CT scans can help determine if these abnormalities are due to insufficient blood flow (ischaemic stroke) or a ruptured blood vessel (haemorrhage). However, it's important to note that CT scans may not always detect strokes, especially in certain areas of the brain, and may take several hours to reveal blockages.
Magnetic resonance imaging (MRI) is another highly effective imaging test for stroke diagnosis. MRI uses magnetic fields, radio waves, and computers to generate detailed images of the brain. MRIs can detect even tiny abnormalities that may be missed by CT scans, making them more accurate. They can also show bleeding, blood flow problems, and brain changes caused by a stroke. Additionally, MRIs can rule out other problems, such as tumours, that may be causing similar symptoms. However, MRIs take longer than CT scans and may not be suitable in emergency situations where quick treatment is crucial.
Angiograms, including CT angiograms (CTA) and CT perfusion, are imaging tests specifically focused on visualising blood vessels and blood flow. These tests provide clear images of the cerebral blood vessels, helping neurologists and physicians make rapid and accurate diagnoses. CT angiograms can identify occluded blood vessels in the brain, guiding treatment decisions, such as the administration of intravenous tissue plasminogen activator (TPA). CT perfusion, on the other hand, involves rapid intravenous infusion of contrast, allowing for the identification of strokes and potential areas of reversible and salvageable brain tissue.
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Blood tests are conducted to check for clotting, infection, and blood sugar levels
While there is no blood test that can diagnose a stroke, doctors may perform a series of blood tests to determine the cause of stroke symptoms and to rule out other potential causes. These tests can also help determine the best treatment for the patient.
Blood tests can be used to check for clotting, infection, and blood sugar levels. A complete blood count (CBC) can be used to diagnose infection (indicated by a high white blood cell count), anemia (too little blood), or other blood abnormalities. Clotting problems can be identified through coagulation tests, which measure how quickly the blood clots.
Blood glucose tests are also important, as high or low blood sugar levels can cause symptoms that may be mistaken for a stroke. Patients with diabetes are at a higher risk of having a stroke, so controlling blood sugar levels is essential for improving their chances of recovery.
In addition to these tests, doctors may also perform imaging tests, such as a CT scan or MRI, to visualize the brain and assess the damage caused by the stroke. These tests can help determine the location and extent of the stroke, as well as rule out other potential causes of stroke-like symptoms.
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Electrocardiograms (ECGs) can detect heart electrical activity and atrial fibrillation
When a person is suspected of having a stroke, tests usually begin in the ambulance, before they arrive at the hospital. These tests help determine whether the person is having a stroke, what type of stroke it is, and what caused it. At the hospital, doctors will often perform imaging tests such as a CT scan or an MRI to visualise the brain and assess the damage.
One of the tests used to determine the cause of stroke symptoms is an electrocardiogram (ECG or EKG). This test is used to detect and record the electrical activity of the heart. It is a quick and easy way to assess heart function and carries minimal risks. Electrodes are placed on the skin, usually on the chest, arms, and legs, and connected to an ECG machine by wires. The machine then measures and interprets the electrical impulses that coordinate the contractions of the heart.
The ECG records the speed and rhythm of the heartbeats and the timing of the electrical impulses as they move through the heart. It can detect atrial fibrillation, which is an irregular heartbeat that can lead to a stroke. An ECG can be performed during physical activity to monitor the heart under stress. This is known as an exercise ECG, which typically involves riding an exercise bike with increasing resistance.
Another variation is the Holter monitor, which records electrical activity over 24 hours. This is used when a patient experiences irregular heartbeats intermittently, which may not show up on a standard ECG. The Holter monitor allows patients to go about their daily activities while wearing a small recording device hung around the neck or on a belt. The data is then transferred to a computer for analysis by a doctor.
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Frequently asked questions
Hospitals use a variety of tests to check for a stroke, including physical exams, neurological exams, blood tests, and imaging tests.
Imaging tests used to diagnose a stroke include computed tomography (CT) scans, magnetic resonance imaging (MRI), CT or MR angiograms, and positron emission tomography (PET). These tests allow doctors to see inside the patient's brain and identify the location and extent of the stroke.
When a patient is suspected of having a stroke, it is treated as a medical emergency. Paramedics are often the first responders, and they begin by assessing the patient's condition and gathering information. The patient is then transported to the nearest Primary Stroke Center, where doctors continue the examination and perform additional tests to confirm the diagnosis and determine the treatment plan.
